/* ===========================================
   浙宇仪器官网 - 主样式表
   现代商务蓝风格 · 高端质感
   =========================================== */

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans CN",
               Inter, system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #1A2B4A;
  background: #fff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; transition: color .25s ease; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ---------- 设计变量 ---------- */
:root {
  --primary-dark: #0A2540;
  --primary: #1E5AFF;
  --primary-light: #7FB0FF;
  --primary-soft: #EAF1FF;
  --accent: #00C2FF;
  --text: #1A2B4A;
  --text-soft: #5A6B85;
  --text-mute: #8A98AE;
  --bg-alt: #F7FAFF;
  --border: #E5EDFA;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(10, 37, 64, 0.04);
  --shadow-md: 0 8px 24px rgba(10, 37, 64, 0.08);
  --shadow-lg: 0 20px 50px rgba(10, 37, 64, 0.12);
  --grad-primary: linear-gradient(135deg, #0A2540 0%, #1E5AFF 100%);
  --grad-soft: linear-gradient(135deg, #EAF1FF 0%, #F7FAFF 100%);
  --container: 1200px;
}

/* ---------- 容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------- 顶部导航 ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 18px 0;
  background: rgba(255, 255, 255, 0);
  backdrop-filter: blur(0);
  transition: background .35s ease, padding .35s ease, box-shadow .35s ease;
}
.navbar.scrolled {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  padding: 12px 0;
  box-shadow: 0 1px 0 rgba(10, 37, 64, 0.06);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo-icon {
  width: 38px; height: 38px;
  display: inline-flex;
  border-radius: 9px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(30, 90, 255, 0.25);
}
.logo-text { display: flex; flex-direction: column; line-height: 1.1; }
.logo-cn {
  font-size: 18px; font-weight: 700;
  color: var(--primary-dark);
  letter-spacing: 1px;
}
.logo-en {
  font-family: "Manrope", "Inter", sans-serif;
  font-size: 9.5px; font-weight: 600;
  color: var(--text-mute);
  letter-spacing: 2px;
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-link {
  position: relative;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  border-radius: 8px;
  transition: color .25s ease, background .25s ease;
}
.nav-link:hover { color: var(--primary); background: var(--primary-soft); }
.nav-link.active { color: var(--primary); }
.nav-link.active::after {
  content: ""; position: absolute;
  left: 50%; bottom: 2px;
  width: 18px; height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transform: translateX(-50%);
}
.nav-cta {
  margin-left: 12px;
  padding: 10px 22px !important;
  background: var(--grad-primary);
  color: #fff !important;
  border-radius: 999px;
  box-shadow: 0 6px 16px rgba(30, 90, 255, 0.3);
}
.nav-cta:hover { transform: translateY(-1px); background: var(--grad-primary); }
.nav-cta.active::after { display: none; }

.hamburger {
  display: none;
  width: 40px; height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.hamburger span {
  width: 22px; height: 2px;
  background: var(--primary-dark);
  border-radius: 2px;
  transition: transform .3s, opacity .3s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  padding: 140px 0 80px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(180deg, #F7FAFF 0%, #fff 100%);
}
.hero-bg {
  position: absolute; inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(30, 90, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 90, 255, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at 60% 50%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 60% 50%, #000 30%, transparent 75%);
}
.hero-glow {
  position: absolute;
  top: -200px; right: -200px;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(30, 90, 255, 0.18), transparent 60%);
  filter: blur(20px);
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 60px;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  font-family: "Manrope", "Inter", sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 4px;
  color: var(--primary);
  padding: 6px 14px;
  background: var(--primary-soft);
  border-radius: 999px;
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(40px, 5.5vw, 68px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin: 0 0 24px;
  color: var(--primary-dark);
}
.hero-title .dot { color: var(--primary); margin: 0 6px; }
.hero-title .grad {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  font-size: 17px;
  color: var(--text-soft);
  margin: 0 0 36px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 60px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 999px;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
}
.btn-primary {
  background: var(--grad-primary);
  color: #fff;
  box-shadow: 0 10px 24px rgba(30, 90, 255, 0.28);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 32px rgba(30, 90, 255, 0.4);
}
.btn-ghost {
  background: transparent;
  color: var(--primary-dark);
  border: 1.5px solid var(--border);
}
.btn-ghost:hover {
  background: var(--primary-soft);
  border-color: var(--primary);
  color: var(--primary);
}
.btn-block { width: 100%; }

.hero-stats {
  display: flex;
  gap: 48px;
  padding-top: 36px;
  border-top: 1px solid var(--border);
}
.stat-num {
  font-family: "Manrope", "Inter", sans-serif;
  font-size: 36px;
  font-weight: 800;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.stat-num sup {
  font-size: 18px;
  font-weight: 600;
  color: var(--primary);
  -webkit-text-fill-color: var(--primary);
  margin-left: 2px;
}
.stat-label {
  font-size: 13px;
  color: var(--text-mute);
  margin-top: 6px;
  letter-spacing: 0.5px;
}

/* Hero 视觉装饰 */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-svg {
  width: 100%;
  max-width: 520px;
  height: auto;
  filter: drop-shadow(0 30px 60px rgba(10, 37, 64, 0.12));
}
.rotate-slow { animation: rotateSlow 40s linear infinite; }
.float-y { animation: floatY 5s ease-in-out infinite; }
.float-y2 { animation: floatY 6s ease-in-out infinite -1s; }
.float-x { animation: floatX 6s ease-in-out infinite; }
.float-x2 { animation: floatX 7s ease-in-out infinite -2s; }

@keyframes rotateSlow { to { transform: rotate(360deg); } }
@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}
@keyframes floatX {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(-10px); }
}

.scroll-indicator {
  position: absolute;
  bottom: 28px; left: 50%;
  transform: translateX(-50%);
  width: 26px; height: 42px;
  border: 1.5px solid var(--text-mute);
  border-radius: 14px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}
.scroll-indicator span {
  width: 3px; height: 8px;
  background: var(--primary);
  border-radius: 2px;
  animation: scrollDot 1.8s ease-in-out infinite;
}
@keyframes scrollDot {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(14px); opacity: 0; }
}

/* ---------- 通用 Section ---------- */
.section {
  padding: 120px 0;
  position: relative;
}
.section-alt { background: var(--bg-alt); }

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 64px;
}
.section-eyebrow {
  display: inline-block;
  font-family: "Manrope", "Inter", sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 4px;
  color: var(--primary);
  padding: 6px 14px;
  background: var(--primary-soft);
  border-radius: 999px;
  margin-bottom: 18px;
}
.section-title {
  font-size: clamp(30px, 3.5vw, 44px);
  font-weight: 800;
  color: var(--primary-dark);
  margin: 0 0 16px;
  letter-spacing: -0.5px;
}
.section-desc {
  font-size: 16px;
  color: var(--text-soft);
  margin: 0;
  line-height: 1.8;
}

/* ---------- 业务范围卡片 ---------- */
.biz-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.biz-card {
  position: relative;
  padding: 40px 32px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease;
  overflow: hidden;
}
.biz-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--grad-soft);
  opacity: 0;
  transition: opacity .35s ease;
  z-index: 0;
}
.biz-card > * { position: relative; z-index: 1; }
.biz-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.biz-card:hover::before { opacity: 1; }
.biz-card.featured {
  background: var(--grad-primary);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 20px 50px rgba(30, 90, 255, 0.2);
}
.biz-card.featured::before { display: none; }
.biz-card.featured h3 { color: #fff; }
.biz-card.featured p { color: rgba(255,255,255,0.85); }
.biz-card.featured .biz-icon { color: #fff; background: rgba(255,255,255,0.15); }
.biz-card.featured .biz-tags span { background: rgba(255,255,255,0.15); color: #fff; }
.biz-card.featured .card-link { color: var(--primary-light); }

.biz-icon {
  width: 64px; height: 64px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  background: var(--primary-soft);
  color: var(--primary);
  margin-bottom: 24px;
  transition: transform .35s ease;
}
.biz-icon svg { width: 32px; height: 32px; }
.biz-card:hover .biz-icon { transform: scale(1.08) rotate(-4deg); }

.biz-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 12px;
  color: var(--primary-dark);
}
.biz-card p {
  font-size: 15px;
  color: var(--text-soft);
  margin: 0 0 20px;
  line-height: 1.75;
}
.biz-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}
.biz-tags span {
  font-size: 12px;
  padding: 4px 12px;
  background: var(--primary-soft);
  color: var(--primary);
  border-radius: 999px;
  font-weight: 500;
}
.card-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: gap .25s ease;
}
.card-link:hover { letter-spacing: 0.5px; }

/* ---------- 关于我们 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 80px;
  align-items: center;
}
.about-text .section-eyebrow { margin-bottom: 16px; }
.about-text .section-title { text-align: left; margin-bottom: 24px; }
.about-text .lead {
  font-size: 18px;
  font-weight: 500;
  color: var(--primary-dark);
  line-height: 1.7;
  margin: 0 0 20px;
}
.about-text p {
  color: var(--text-soft);
  line-height: 1.85;
  margin: 0 0 16px;
}
.check-list {
  list-style: none;
  padding: 0;
  margin: 28px 0 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.check-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14.5px;
  color: var(--text);
}
.check {
  width: 20px; height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--grad-primary);
  flex-shrink: 0;
  position: relative;
}
.check::after {
  content: "";
  width: 9px; height: 5px;
  border-left: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(-45deg) translate(1px, -1px);
}

.about-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.about-card {
  padding: 36px 24px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  transition: transform .35s ease, box-shadow .35s ease;
}
.about-card:nth-child(1) { transform: translateY(0); }
.about-card:nth-child(2) { transform: translateY(20px); }
.about-card:nth-child(3) { transform: translateY(0); }
.about-card:nth-child(4) { transform: translateY(20px); }
.about-card:hover {
  transform: translateY(-4px) !important;
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}
.about-num {
  font-family: "Manrope", "Inter", sans-serif;
  font-size: 48px;
  font-weight: 800;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.about-num sup {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  -webkit-text-fill-color: var(--primary);
}
.about-label {
  font-size: 14px;
  color: var(--text-soft);
  margin-top: 8px;
}

/* ---------- 产品中心 ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.product-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease;
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}
.product-img {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.product-img svg { width: 70%; height: auto; transition: transform .5s ease; }
.product-card:hover .product-img svg { transform: scale(1.08); }
.product-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.2), transparent 60%);
  pointer-events: none;
}

.p-gradient-1 { background: linear-gradient(135deg, #EAF1FF, #C8DAFF); }
.p-gradient-2 { background: linear-gradient(135deg, #0A2540, #1E5AFF); }
.p-gradient-3 { background: linear-gradient(135deg, #D8E5FF, #EAF1FF); }
.p-gradient-4 { background: linear-gradient(135deg, #F0F6FF, #DCE8FF); }
.p-gradient-5 { background: linear-gradient(135deg, #1E5AFF, #7FB0FF); }
.p-gradient-6 { background: linear-gradient(135deg, #E8EFFD, #F7FAFF); }

.product-body { padding: 24px 24px 28px; }
.product-tag {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}
.product-body h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--primary-dark);
  margin: 0 0 8px;
}
.product-body p {
  font-size: 14px;
  color: var(--text-soft);
  margin: 0 0 18px;
  line-height: 1.6;
}

/* ---------- 新闻 ---------- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.news-card {
  padding: 32px 28px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease;
}
.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.news-date {
  font-family: "Manrope", "Inter", sans-serif;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-mute);
  letter-spacing: 1px;
}
.news-tag {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 3px 10px;
  border-radius: 999px;
}
.news-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary-dark);
  line-height: 1.5;
  margin: 0 0 12px;
  transition: color .25s ease;
}
.news-card:hover h3 { color: var(--primary); }
.news-card p {
  font-size: 14.5px;
  color: var(--text-soft);
  line-height: 1.75;
  margin: 0 0 18px;
}

/* ---------- 联系我们 ---------- */
.contact-section { background: linear-gradient(180deg, #fff 0%, var(--bg-alt) 100%); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 60px;
  align-items: start;
}
.contact-info {
  background: #fff;
  padding: 40px 36px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.contact-item {
  display: flex;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}
.contact-item:last-of-type { border-bottom: none; }
.ci-icon {
  width: 44px; height: 44px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-soft);
  color: var(--primary);
  border-radius: 12px;
}
.ci-icon svg { width: 22px; height: 22px; }
.ci-icon.wechat { background: rgba(7, 193, 96, 0.1); color: #07C160; }
.ci-icon.douyin { background: rgba(37, 38, 42, 0.08); color: #25262A; }
.ci-label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-mute);
  letter-spacing: 1px;
  margin-bottom: 4px;
  text-transform: uppercase;
}
.ci-value {
  font-size: 15.5px;
  color: var(--text);
  font-weight: 500;
  line-height: 1.5;
}

.qr-block {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}
.qr-placeholder {
  width: 130px; height: 130px;
  margin: 0 auto 12px;
  padding: 8px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
}
.qr-placeholder svg { width: 100%; height: 100%; }
.qr-block p {
  font-size: 13px;
  color: var(--text-mute);
  margin: 0;
}

/* 留言表单 */
.contact-form {
  background: var(--grad-primary);
  color: #fff;
  padding: 44px 40px;
  border-radius: var(--radius-lg);
  box-shadow: 0 30px 60px rgba(10, 37, 64, 0.25);
  position: relative;
  overflow: hidden;
}
.contact-form::before {
  content: "";
  position: absolute;
  top: -100px; right: -100px;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(127, 176, 255, 0.4), transparent 60%);
  pointer-events: none;
}
.contact-form > * { position: relative; }
.contact-form h3 {
  font-size: 24px;
  font-weight: 700;
  margin: 0 0 6px;
  color: #fff;
}
.form-tip {
  font-size: 14px;
  color: rgba(255,255,255,0.75);
  margin: 0 0 28px;
}
.form-row { margin-bottom: 18px; }
.form-row label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}
.req { color: var(--accent); }
.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: 14.5px;
  font-family: inherit;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 10px;
  color: #fff;
  transition: background .25s ease, border-color .25s ease;
}
.form-row input::placeholder,
.form-row textarea::placeholder { color: rgba(255,255,255,0.5); }
.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: none;
  background: rgba(255,255,255,0.18);
  border-color: var(--accent);
}
.form-row select option { color: var(--text); }
.form-row textarea { resize: vertical; min-height: 100px; }
.contact-form .btn-primary {
  background: #fff;
  color: var(--primary-dark);
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}
.contact-form .btn-primary:hover {
  background: var(--primary-light);
  color: #fff;
}
.form-notice {
  margin: 16px 0 0;
  font-size: 12.5px;
  color: rgba(255,255,255,0.65);
  text-align: center;
}

/* ---------- 页脚 ---------- */
.footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.7);
  padding-top: 70px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 60px;
  padding-bottom: 50px;
}
.footer-brand .footer-logo {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  margin: 0;
  color: rgba(255,255,255,0.6);
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin: 0 0 18px;
  letter-spacing: 1px;
}
.footer-col a {
  display: block;
  font-size: 13.5px;
  color: rgba(255,255,255,0.55);
  margin-bottom: 10px;
  transition: color .25s ease;
}
.footer-col a:hover { color: var(--primary-light); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 22px 0;
}
.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,0.45);
}

/* ---------- 滚动渐入动画 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .8s cubic-bezier(0.16, 1, 0.3, 1),
              transform .8s cubic-bezier(0.16, 1, 0.3, 1);
}
[data-reveal].in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .container { padding: 0 24px; }
  .hero-inner,
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 50px;
  }
  .hero-visual { order: -1; max-width: 420px; margin: 0 auto; }
  .biz-grid,
  .product-grid,
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-stats { gap: 32px; flex-wrap: wrap; }
  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .section { padding: 80px 0; }
  .section-head { margin-bottom: 48px; }

  /* 移动端导航 */
  .hamburger { display: flex; }
  .nav-links {
    position: fixed;
    top: 70px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    padding: 20px 24px 32px;
    gap: 4px;
    transform: translateY(-110%);
    transition: transform .35s ease;
    box-shadow: 0 12px 32px rgba(10, 37, 64, 0.08);
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { transform: translateY(0); }
  .nav-link { padding: 14px 16px; }
  .nav-link.active::after { display: none; }
  .nav-cta { margin: 12px 0 0; text-align: center; }

  .hero { padding: 110px 0 60px; min-height: auto; }
  .hero-stats { gap: 28px; }
  .stat-num { font-size: 28px; }

  .biz-grid,
  .product-grid,
  .news-grid {
    grid-template-columns: 1fr;
  }

  .check-list { grid-template-columns: 1fr; }
  .about-cards { grid-template-columns: 1fr 1fr; gap: 14px; }
  .about-card { padding: 28px 18px; }
  .about-num { font-size: 36px; }
  .about-card:nth-child(2),
  .about-card:nth-child(4) { transform: translateY(0); }

  .contact-info,
  .contact-form { padding: 32px 24px; }

  .footer-cols { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom .container { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; }
  .about-cards { grid-template-columns: 1fr; }
}

/* ===========================================
   v2 增量样式（双主业版）
   新增：双主业柱、资质证书、服务区域、化工产品
   =========================================== */

/* 琥珀色变量（危化品业务点缀色） */
:root {
  --amber: #F59E0B;
  --amber-dark: #D97706;
  --amber-light: #FBBF24;
  --amber-soft: #FEF3C7;
  --danger: #DC2626;
}

/* ---------- 导航：容纳更多链接 ---------- */
.nav-links { gap: 4px; }
.nav-link { padding: 8px 12px; font-size: 14.5px; }

/* ---------- Hero 统计：4 项调整 ---------- */
.hero-stats { gap: 36px; }
.stat-num sup {
  font-family: "PingFang SC", sans-serif;
  font-size: 14px;
  font-weight: 600;
  margin-left: 3px;
}

/* ---------- 双主业（业务范围 v2） ---------- */
.pillars {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: stretch;
}
.pillar {
  position: relative;
  padding: 40px 32px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: transform .35s ease, box-shadow .35s ease;
  overflow: hidden;
}
.pillar:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.pillar-amber {
  background: linear-gradient(180deg, #FFFBEB 0%, #fff 60%);
  border-color: #FDE68A;
}
.pillar-amber-line {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--amber-dark), var(--amber-light));
}

.pillar-head { margin-bottom: 28px; }
.pillar-icon {
  width: 64px; height: 64px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  margin-bottom: 18px;
}
.pillar-icon svg { width: 36px; height: 36px; }
.pillar-icon-blue {
  background: var(--primary-soft);
  color: var(--primary);
}
.pillar-icon-amber {
  background: var(--amber-soft);
  color: var(--amber-dark);
}
.pillar-tag {
  display: inline-block;
  font-family: "Manrope", "Inter", sans-serif;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.pillar-tag-amber {
  color: var(--amber-dark);
  background: var(--amber-soft);
}
.pillar-title {
  font-size: 26px;
  font-weight: 800;
  color: var(--primary-dark);
  margin: 0 0 12px;
}
.pillar-desc {
  font-size: 14.5px;
  color: var(--text-soft);
  line-height: 1.8;
  margin: 0;
}

/* 子品类卡片 */
.sub-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 28px;
}
.sub-card {
  padding: 16px 14px;
  background: var(--bg-alt);
  border-radius: 12px;
  border: 1px solid transparent;
  transition: background .25s ease, border-color .25s ease, transform .25s ease;
}
.sub-card:hover {
  background: #fff;
  border-color: var(--primary-light);
  transform: translateY(-2px);
}
.pillar-amber .sub-card { background: rgba(255, 251, 235, 0.6); }
.pillar-amber .sub-card:hover { background: #fff; border-color: var(--amber); }

.sub-icon {
  width: 32px; height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: var(--primary-soft);
  color: var(--primary);
  margin-bottom: 8px;
}
.sub-icon svg { width: 18px; height: 18px; }
.sub-icon-amber {
  background: var(--amber-soft);
  color: var(--amber-dark);
}
.sub-card h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary-dark);
  margin: 0 0 4px;
}
.sub-card p {
  font-size: 12.5px;
  color: var(--text-mute);
  margin: 0;
  line-height: 1.5;
}

/* ---------- 资质证书 ---------- */
.qual-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.qual-card {
  position: relative;
  padding: 24px 20px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease;
}
.qual-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--amber);
}
.cert {
  width: 100%;
  max-width: 160px;
  margin: 0 auto 18px;
  aspect-ratio: 160 / 110;
  filter: drop-shadow(0 8px 16px rgba(10, 37, 64, 0.08));
}
.cert svg { width: 100%; height: 100%; }
.qual-card h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--primary-dark);
  margin: 0 0 8px;
  line-height: 1.4;
  min-height: 42px;
}
.cert-issuer {
  font-size: 12.5px;
  color: var(--text-mute);
  margin: 0 0 14px;
  line-height: 1.5;
}
.cert-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--amber-dark);
  background: var(--amber-soft);
  padding: 4px 12px;
  border-radius: 999px;
}
.cert-badge-blue {
  color: var(--primary);
  background: var(--primary-soft);
}
.qual-foot {
  margin-top: 40px;
  padding: 24px 32px;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.08), rgba(217, 119, 6, 0.04));
  border: 1px solid #FDE68A;
  border-radius: var(--radius);
  font-size: 14.5px;
  color: var(--text);
  line-height: 1.8;
}
.qual-foot strong {
  color: var(--amber-dark);
  font-weight: 700;
  margin-right: 6px;
}

/* ---------- 关于我们：双主业版调整 ---------- */
.about-text .lead { color: var(--primary-dark); }
.about-cards .about-num { font-size: 44px; }

/* ---------- 产品中心：双主业版 ---------- */
.prod-group-title {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 56px 0 24px;
}
.prod-group-title:first-of-type { margin-top: 0; }
.prod-group-tag {
  font-family: "Manrope", "Inter", sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  padding: 5px 14px;
  border-radius: 999px;
}
.prod-group-tag-blue {
  color: var(--primary);
  background: var(--primary-soft);
}
.prod-group-tag-amber {
  color: var(--amber-dark);
  background: var(--amber-soft);
}
.prod-group-title h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary-dark);
  margin: 0;
}
.product-card-chem {
  border-color: #FDE68A;
}
.product-card-chem:hover { border-color: var(--amber); }

.product-tag-amber {
  color: var(--amber-dark) !important;
  background: var(--amber-soft) !important;
}

/* 化工产品渐变 */
.p-gradient-amber-1 { background: linear-gradient(135deg, #FEF3C7, #FDE68A); }
.p-gradient-amber-2 { background: linear-gradient(135deg, #DBEAFE, #BFDBFE); }
.p-gradient-amber-3 { background: linear-gradient(135deg, #FECACA, #FCA5A5); }
.p-gradient-amber-4 { background: linear-gradient(135deg, #E0E7FF, #C7D2FE); }

.product-note {
  margin: 36px 0 0;
  padding: 16px 22px;
  background: rgba(245, 158, 11, 0.06);
  border-left: 3px solid var(--amber);
  border-radius: 8px;
  font-size: 13.5px;
  color: var(--text-soft);
  line-height: 1.7;
}
.product-note strong { color: var(--amber-dark); }

/* ---------- 服务区域 ---------- */
.area-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.area-card {
  position: relative;
  padding: 28px 22px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease;
}
.area-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}
.area-card-hq {
  background: var(--grad-primary);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 14px 30px rgba(30, 90, 255, 0.18);
}
.area-card-hq:hover { border-color: transparent; }
.area-card-hq h3 { color: #fff; }
.area-card-hq p { color: rgba(255,255,255,0.8); }
.area-card-hq .area-pin { color: var(--amber-light); }

.area-pin {
  width: 36px; height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: 12px;
}
.area-pin svg { width: 28px; height: 28px; }
.area-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary-dark);
  margin: 0 0 8px;
}
.area-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-mute);
  background: var(--bg-alt);
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}
.area-tag-hq {
  color: var(--amber-light);
  background: rgba(255,255,255,0.18);
}
.area-card p {
  font-size: 12.5px;
  color: var(--text-soft);
  line-height: 1.65;
  margin: 0;
}

/* ---------- 联系方式：抖音链接 ---------- */
.ci-value strong { color: var(--primary-dark); font-size: 16px; letter-spacing: 0.5px; }
.douyin-link {
  display: inline-block;
  margin-left: 10px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(30, 90, 255, 0.3);
}
.douyin-link:hover { text-decoration-color: var(--primary); }

/* ---------- v2 响应式 ---------- */
@media (max-width: 1024px) {
  .pillars { grid-template-columns: 1fr; }
  .qual-grid { grid-template-columns: repeat(2, 1fr); }
  .area-grid { grid-template-columns: repeat(2, 1fr); }
  .sub-cards { grid-template-columns: 1fr 1fr; }
  .hero-stats { gap: 24px; }
  .stat-num { font-size: 30px; }
}

@media (max-width: 768px) {
  .pillar { padding: 32px 24px; }
  .sub-cards { grid-template-columns: 1fr 1fr; gap: 10px; }
  .qual-grid { grid-template-columns: 1fr; }
  .area-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .area-card { padding: 22px 16px; }
  .prod-group-title { flex-direction: column; align-items: flex-start; gap: 8px; margin: 40px 0 18px; }
  .prod-group-title h3 { font-size: 19px; }
  .qual-foot { padding: 18px 22px; font-size: 13.5px; }
  .hero-stats { gap: 18px; }
  .stat-num { font-size: 24px; }
  .stat-num sup { font-size: 11px; }
  .stat-label { font-size: 11.5px; }
}

@media (max-width: 480px) {
  .sub-cards { grid-template-columns: 1fr; }
  .area-grid { grid-template-columns: 1fr; }
}